RunStitchr is a tool for correcting GPS data. Often times when running in an area with satellite interference (such as a city with tall buildings) the GPS device will log incorrect data points which will cause the route and pacing to be incorrect.

1. Upload the gps data file you need to correct
2. Click the line button to draw a box around the points you need to fix - it's recommended that you do this on no more than a few hundred points at a time
3. Repeat step 2 as necessary to correct any anomalous points
4. Click download to get corrected data file.

Head to the issues page and post!